Try port for Travis

Author: ankane

.travis.yml

@@ -18,6 +18,8 @@ jobs:
         - echo "shared_preload_libraries = 'pg_stat_statements'" | sudo tee -a /etc/postgresql/13/main/postgresql.conf
         - sudo systemctl restart postgresql@13-main
         - createdb pghero_test
+      env:
+        - PGPORT=5433
     - name: "Postgres 12"
       rvm: 2.7
       gemfile: Gemfile